Protected metal article



J H Y O U N G.

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P to te O Patented Oct. 17, 1922.

; umrao STATES PATENT OFFICE.

JAMES -HOWARD YOUNG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO H. H. ROBERTSON COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PROTECTED METAL ARTICLE.

Application filed February. 24, 1922. Serial No. 538,945.

To all whom it may concern:

Be it kndwn that I, JAMEs HOWARD YoUNa, a citizen of the United States, residing in Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented an Improvement in Protected Metal Article, of which the following description,

in connection with the accompanying draw ings, is a specification, like characters on the drawings representing like parts.

This invention relates to a protected metal article of the class described in U. S. Patent No. 1,277,755 dated September 3, 19.1.8.

.The present invention has for its object to improve protected metal articles of the class referred to, whereby their fire-resisting qualities are materially increased and a superior product for building purposes is obtained.

To this end, the fibrous layer forming part of the protected metal article,and usually of asbestos aper or felt, is impregnated or saturated wit a bituminous composition, which possesses the required fluidity to readily penetrate into the felt layer, and also possesses the ability to resist fire and particularly the ability to prevent the layer of fire resisting asphalt.

A suitable bitumlnous composition possessing these characteristics may be obtained by incorporating with asphalt or like bituminous material, chlorinated organic compounds which are substantially non-volatile at ordinary temperatures and which will flux with the asphalt or like bituminous material, and particularly chlorinated naphthalene. Such a bituminous composition will be hereinafter designated as a fire-resisting asphalt.

The particular features of the invention will be pointed out in the claims at the end of this specification.

Fi 1 is a plan of a protected metal artic e embodying this invention, with parts 45., broken away, and

Fig. 2, a section on an the line 2-2, Fig. 1.

Referring to the drawing, (1 represents the metal article to be protected, which may 50 be a bar, sheet or other article, and which is represented in the form of a sheet and will be hereinafter so designated.

The metal sheet (.1. herein shown is covered enlarged scale, on

with a coating or layer 7) of asphalt or like bituminous material, preferably a relatively hard or high-melting point asphalt. The

metal sheet a has aflixed to it a layer 0 of fibrous material, such as asbestos paper or felt, which, in accordance with this invention, is saturated with a fire-resisting asphalt, preferably asphalt fluxed with chlorinated napthalene, and this saturated felt layer 0 preferably has affixed to it a layer d of asphalt, preferably of hi h-melting point.

The fire-resisting asphai may be composed of asphalt and chlorinated-naphthalene in various proportions, and excellent results have been obtainedwith the asphalt and the chlorinated naphthalene mixed in equal proportions; that is, of chlorinated naphthalene and 50% asphalt.

The protected metal sheet having its felt or fibrous layer 0 saturated with the fireresisting asphalt has been demonstrated by tests on a large scale to resist the spreading of fire, which is highly desirable when the protected metal sheet is embodied in buildings, and this fire resistance may be further increased by using a fire-resisting asphalt, such as described for the inner asphalt layer b and also for the outer asphalt coating or layer d, but as the cost of the fire-resisting asphalt is higher than that of the plain or non-fire resisting asphalt, it has been found suflicient for ordinary building purposes to employ the fire-resisting asphalt as the saturant for the felt layer and to use a relatively high melting point asphalt for the inner layer 6 and for the outer layer (Z.

The fire-resisting asphalt has the property of localizing the flame to that area of the protected metal sheet, which is heated, and does not carry the flame to parts of the surface outside of the heated zone, and in this sense said saturant does not support combustion and is fireresisting.

By the term asphalt as used in the claims, I desire to include bituminous prodnets of similar nature to asphalt.

Claims.

1. A protected metal article comprising a metal article having a coating of relatively hard asphalt, a layer of felt impregnated with a fire resisting asphalt and affixcd to the metal article by said asphalt coating, and a layer of relatively hard asphalt applied to said felt layer.

2. A protected metal article comprising a metal article having a coating of relatively hard asphalt, a layer of felt affixed to said metal article and impregnated with a fireresisting asphalt composed of asphalt and chlorinated-naphthalene, and a layer of relatively hard asphalt applied to said felt layer.

3. A protected metal article comprisin a metal article provided With a layer of elt adhesively afiixed thereto and impregnated 10 with a fire resisting asphalt.

4. A protected metal article comprising a metal article provided with a protective layer of fire resisting asphalt.

In testimony whereof, I have signed my 15 name to this specification.

JAMES HOWARD YOUNG.

,Certiflcate of Correction. It is hereby certified that in Letters Patent No. 1,432,612, granted October 17,

V 1922, upon the application of ames Howard Young, of Pittsburgh, Pennsylvania,

for an improvement. in Protected Meta-l Articles, an error appears in the print-oi specification requiring ooirection as follows: Page 1, line 28, strike out the wor ds layer of fire resistingasphalt and insert epreading of a fire if one is s arted; and that the said Letters Patent should be read with this correction therein that. the same may conforin to the record of the case in thelf'atant 02500.

Signed and sealed this 5th day of Dacembor; A. D., 1922.

[m] KARL FENNIHG,

4m 0mm 6; PM. 

